Scan tool



FIG. 1 is front view of a scan tool according to the present design;

FIG. 2 is a rear view of the invention;

FIG. 3 is a right side view of the invention;

FIG. 4 is a left side view of the invention;

FIG. 5 is a top view of the invention; and,

FIG. 6 is a bottom view of the invention. 

The ornamental design for a scan tool, as shown and described. 